Figure 6-4. Horizontal circle clamp assembly, disassembly and assembly.

TM 5-6675-270-15

Figure 6-4. Horizontal circle clamp assembly, disassembly and assembly.

scratches. Inspect the lever axis for wear and

6-20. Assembly

rough surfaces.

a. Refer to figure 6-4 and assemble the hori-

zontal circle clamp assembly.

c. Repair. Remove all burs and minor dents.

b. Install the horizontal circle clamp assembly

Chase threaded parts having minor thread

damage.

Section VI. HORIZONTAL CIRCLE PRISM ASSEMBLY

b. Refer to figure 6-5 and disassemble the hori-

6-21. General

zontal circle prism assembly.

The horizontal circle prism assembly is located

on the left side of the theodolite in the upper part

6-43. Cleaning, Inspection, and Repair

of the horizontal circle housing. It consists of a

a. Cleaning. Clean all metal parts with a clean-

cover, prism housing, metal prisms, glass prism,

ing solvent. Clean and polish the glass prism with

and adjusting and attaching hardware. This

a soft cloth or lens tissue.

prism assembly transmits the horizontal circle

scale readings to the reading lens assembly.

b. Inspection. Inspect the prisms and prism

housings for cracks, burs, and damaged surfaces.

6-22. Disassembly

Inspect all hardware for worn or damaged

a. Remove the horizontal circle prism assembly

threads.

6-6